[MEncoder-users] rip dvd to mkv, ogm, mp4 script

[Martin Matusiak]

On Mon, Oct 13, 2008 at 5:29 PM, Laine Lee <llee at lonestar.utsa.edu> wrote:
> On 10/13/08 3:57 AM, "Stroller" <stroller at stellar.eclipse.co.uk> wrote:
>
>>
>> On 12 Oct 2008, at 20:58, Laine Lee wrote:
>>> ...
>>> Thanks. But I'm not looking at the output of the undvd conversion
>>> process,
>>> I'm just looking at the frame rate displayed in the player when I
>>> play the
>>> resulting .avi file. It's 29.97 and it's choppy. Is there a change I
>>> can
>>> make in undvd command that will make it come out as 23.976?
>>
>> I've generally found the output framerate to reflect that of the
>> original source disk.
>>
>> IE: here undvd is producing 29.97fps files from Region 1 NTSC DVDs and
>> 25fps files from Region 2 PAL DVDs.
>>
>> This has been consistent over all the handful of disks I have tried.
>>
>> This is surely down to MPlayer - I don't think undvd makes any request
>> to change framerate (and IMO I don't think it should, either).
>
> I wouldn't doubt that. I did devise a workaround for the problem by
> introducing an additional line into the undvd executable's encoding process
> that specifies "-ofps 24000/1001". I realize that there shouldn't be a need
> for such a modification, but until I can figure out what's wrong, this seems
> to completely eliminate my problem with the conversion of DVD titles that
> have a 24 fps rate. I would, however, like to find some way to improve
> quality of the output. It looks really good, but the resulting AVI is only
> 1.4G while the sum of the original VOBs adds up to over 5G for the latest
> title I've worked with, so I suspect that some quality is being left behind.
> Not too much, probably, because I am converting to h264.

You can tune the quality either by setting an output filesize with
--size or by setting --bpp directly (bits per pixel, a measure of the
data <-> space tradeoff).

>>
>> What do you mean by "stuttering"? I would tend to use this to mean
>> quite dramatic pauses in playback, the kind one might ascribe to
>> insufficient CPU on the playback device.
>>
>
> I just said "choppy". That's meant to be vague. It only means that the
> motion is not as smooth as I know it should be (the way it was on the
> original). But as I stated above, my specified output frame rate
> modification eliminates the problem.
>
>> I have an NTSC PS3 here and expected to see some kind of "pulldown"
>> effect when playing these "PAL" rips, but have been unable to do so.
>> Perhaps it is just my eyes, but apparently to me the effect of
>> different framerates is very minor.
>
> But you do encounter a change between original and output frame rates?
>
> Thanks.
>
> --
> Laine Lee
>
>
>
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